Socket Flat Head Cap Screw, System of Measurement Inch, Flat, Basic Material Steel, Material Grade Alloy Steel, 5/16 In. -18, Length 2 in, Fastener Finish Black Oxide, Fastener Thread Type UNC (Coarse), Drive Type Hex Socket, Drive Size 3/16 in, Thread Style Partially Threaded, Thread Direction Right Hand, Min. Thread Length 1 1/8 in, Thread Length 1 1/8 in, Head Height 0.198 in, Thread Dia. 5/16 in, Head Angle (Deg. ) 82 Degrees, Package Quantity 100